Device for automatically controlling opening and closing of a vehicle slide door

Abstract

A device for automatically controlling a slide door for a vehicle, wherein the slide door is adapted to open and close along a guide track installed in a vehicle body, the device having a door drive device, a motor load detection device, a door position detection device adapted to detect a position of the slide door guided by the guide track within a range from a position where the slide door is fully opened to a position where the slide door is fully closed, a door speed detection device, a memory device adapted to store the motor load at each position of the slide door of the vehicle standing at a horizontal level, and a motor control device adapted to automatically control power supplied to the motor for moving the slide door based on a difference between a detected motor load and a stored motor load at a corresponding position

Description

[0001]This application is a divisional application of U.S. Ser. No. 09 / 714,436, filed Nov. 17, 2000 now U.S. Pat. No. 6,729,071, which is in turn a continuation of application U.S. Ser. No. 09 / 051,053, filed Mar. 31, 1998 now U.S. Pat. No. 6,164,015, which is the national stage of PCT / JP96 / 02964, filed Oct. 2, 1996.TECHNICAL FIELD[0002]The invention relates to a device for automatically controlling the open-close of a slide door for a vehicle, the slide door installed on a side face of the vehicle and the like in order to automatically open and close the slide door by means of drive sources such as motors and the like.BACKGROUND TECHNOLOGY[0003]A device for automatically controlling the open-close of a slide door of a vehicle has been known, which moves or open and close the slide door so supported as to slide on a side face of the vehicle along its front and back direction by means of motor and the like. According to the device mentioned above, a user intentionally operates an oper...

AI Technical Summary

Benefits of technology

[0018]Consequently, according to this invention, it is possible to provide a device for automatically controlling the open-close of the slide door for the vehicle, which memorizes a normal time motor load concerning the open position and the close position of the slide door, and which controls correctly by using the memory, the motor load detected value, the door movement detected value, the position detected value, each corresponding to a vehicle posture on a slope and the sudden load change due to a pinch and the like, without an over power reaction, and by which thus heavy slide door can be safely and quickly driven.

[0019]Still also, according to this invention, the door drive force can be exchanged from the manual to the automatic operation force only within a predetermined relatively stable speed range of the middle level excepting a low speed which is not attained by the manual operation and excepting a high speed which is like one occurred when the vehicle stands on a downward slope and is too dangerous to the manual operation. Therefore, this is very safe.

[0021]Still also, according to this invention, it is possible to easily detect a slant degree of the slope or of the vehicle without usage of a special slant measurement sensor.

[0022]Still also, it is possible to carry out intermittently the chance of detecting the door movement speed and determine a suitability difference corresponding to a feedback value for applying a minus feedback to the motor control when two times or more of the over speed or the less speed, which are intermittently detected, are continually detected, so that the over speed condition and the less speed condition can be firmly detected. Furthermore, because that the suitability difference is not directly used as a feedback value for the motor control and it is possible to suitably adjust it according to the target speed, it is possible to adjust a widening of the suitability difference so as to reach swiftly the target speed in case that the slide door stands on a relatively safe position. Furthermore, because this device has the adjustment volume re-adjustment means for re-adjusting the adjustment volume according to the door movement situation, it is possible to again adjust the door speed according to different speeds of the door response by reflecting the first adjustment volume generated the over speed or the less speed on the motor. Accordingly, it is possible to prevent the slide door from being too fast response due to a steep slope on which the vehicle stands and an over feedback such as an overshoot to be generated due to a response delay of a transmission mechanism for transmitting power of the motor to the slide door, resulting in a smooth and swift control of the motor speed always.

[0023]Still also, because that the motor load data concerning a door drive has been memorized according to the door position, a predetermined or known motor load data of a door position at a time of a pinch occuring can be used, the known motor load data is previously read and the situation is judged by forecasting any change of the known data, it is possible to swiftly detect a pinch after the door moves a short distance and to safely manage and use the slide door.

Problems solved by technology

However, according to the conventional device described above, a heavy weight of such slide door and resultantly a load used-to drive the heavy slide door is apt to be effected by its position and direction of open and close.

In particular, when the vehicle considerably slants in its front and back direction along the moving track of the slide door, it is necessary to use a very large hosting force of weight of the slide door and a minus load necessary to break such hoisting force, so it has been difficult to design the automatic open-close control device in sufficiently consideration of a safety means for such dangerous situation.

However, such door drive means has small sensibility for small change of load, so it has been difficult to control a large output power in consideration of safety and preventing a pinch in the slide door.

For example, when a chance of exchanging a manual force to an electric power is determined by a door traveled distance, it is very difficult to firmly recognize that manual force moves the slide door.

Such posture of the door widen the door load change width or range or door load itself becomes large, so that it becomes difficult to change a firm manual force for the door to an automatic force.

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